2581 FlowtraMag Flow Meter



  • Bluetooth Compatible
  • Thermoplastic Body
  • Chemical & Water Media

2581 FlowtraMag Flow Meter

The GF 2581 FlowtraMag Meter is a full-bore Industrial Light weight plastic inline magnetic flow meter, based on the popular electromagnetic principle, using faraday’s law. The PVC-U body with Hastelloy® C or Titanium electrodes makes the FlowtraMag meter ideally suited for many chemical and water applications.

The 2581 flow meter is designed specifically for high-accuracy flow measurement in application where long straight runs of pipe are not possible; the 2581 is designed to work on short pipe runs, 3x ID upstream and 2x ID downstream of the sensor.

The thermoplastic body of the FlowtraMag Flow Meter construction provides superior corrosion resistance for a long, maintenance-free service life. The FlowtraMag is two to three times lighter in weight compared to traditional metal magnetic flow meters on the market. The unit offers an accuracy of ±1% of reading and repeatability of ±0.5%.

Streamlined monitoring and complete versatility are provided via the meter’s broad communications capabilities across multiple platforms. These include digital (S3L), Frequency, analogue 4 to 20 mA, Smartphone/Tablet (Bluetooth®), and PC (Digital S3L) via the 0252 Configuration Tool.

The 2581- is ideal for a range of applications including chilled water, water chemicals and batching.

Features of the 2581 FlowtraMag Flow Meter

  • No moving parts
  • Lighter in weight compared to traditional metal magnetic flow meters
  • Reduced straight run requirements, ideal for final effluent lines, wellheads, and skids
  • Factory calibrated with certificate (±1% of reading accuracy)
  • Partially filled pipe detection status indicator
  • Reverse flow direction configurable with 0252 Configuration Tool or GF Config Tool Bluetooth® App
  • One device with three different outputs: select in the field either Frequency or Digital (S³L), and analogue 4 to 20 mA in both passive and active configuration
  • On-the-fly configuration with GF Config Tool Bluetooth® App

Bluetooth® 4.2 capable, supports iOS and Android for simple user configuration with instantaneous flow reading.

Suitable Applications

  • Chemical Processing/Production
  • Cooling Tower
  • Filtration Systems
  • Water and Wastewater Treatment
  • Municipal and Industrial Water Distribution
  • Pool and Aquatics
  • Process Control, Water Process Flow
  • Reverse Osmosis
  • Scrubber Systems
  • Metal Recovery and Landfill Leachate
  • Mining


Manufacturer: GF Signet

Part Ref: GF-2581

IWN: FLO-002581

Media Type: Liquids

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Specification Detail of the GF Signet 2581 FlowtraMag Flow Meter:

Pipe Size

DN25, DN40, DN50, DN80,



± 0.5% of reading @ 25 °C (77 °F)


± 1% of reading plus ± 0.01 m/s (0.033 ft/s), reference condition 50 μS/cm and water based.

Maximum Operating Pressure & Temperature

10 bar @ 23 °C (145 psi @ 73 °F)

​Frequency Output

5 to 24 VDC, 50 mA max.

Frequency Range

0 to 1500 Hz

Flow Range:

0.02 – 10 m/s


NEMA 4X / IP65


4 to 20 mA per ANSI-ISA 50.00.01 Class H

Active Output: 4 to 20 mA

Passive / Active: User selectable

Passive Loop Voltage: 12 to 32 VDC

Power Supply

24 VDC, max 24 W (12 to 32 VDC)

Reverse Polarity Protected Up to 35 VDC

General Approvals

CE, FCC, NSF (Titanium only, does not include flange gaskets)

UL, CUL Recognized Component

RoHS compliant, China RoHS

Manufactured under ISO 9001, ISO 14001, and ISO 45001​

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